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Investigation into durable polymers with enhanced toughness and elasticity for application in flexible Li-Ion batteries
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Jenkins, Craig, Coles, Stuart R. and Loveridge, Melanie J. (2020) Investigation into durable polymers with enhanced toughness and elasticity for application in flexible Li-Ion batteries. ACS Applied Energy Materials . doi:10.1021/acsaem.0c02442 (In Press)
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WRAP-Investigation-durable-polymers-enhanced-toughness-elasticity-application-Jenkins-2020.pdf - Accepted Version Embargoed item. Restricted access to Repository staff only until 8 December 2021. Contact author directly, specifying your specific needs. - Requires a PDF viewer. Download (2074Kb) |
Official URL: http://dx.doi.org/10.1021/acsaem.0c02442
Abstract
Next-generation wearable devices compel the development of lithium-ion batteries (LIBs) that can afford mechanical flexibility while remaining safe and stable energy sources. In conventional battery designs the electrode coatings are susceptible to fracture and disintegration when exposed to cyclic flexure. This results in capacity loss, resistance increases, and severely limits their cycle life. Polyurethane (PU) has been investigated as a battery binder but without research into the variety of chemistries available, and how they affect performance. This research investigates three different PU chemistries, each composed of a different polyol backbone–polyester, polyether and polycaprolactone. These are compared with PVDF, the most commonly used rigid binder in industry. The combination of electrochemical and mechanical characterization identified the importance of PU binder chemistry, particularly when the binder’s interaction with the electrolyte was considered. Both the polyester and polycaprolactone PU chemistries swelled significantly when placed in an electrolyte, compromising their conductive networks and mechanical advantages. In contrast, polyether PU was found to be a suitable binder for flexible batteries as it has strong adhesion and retains its properties even after swelling in the electrolyte. These findings present a promising polymer choice to facilitate the development of advanced and durable electrodes for flexible energy storage systems.
| Item Type: | Journal Article | ||||||
|---|---|---|---|---|---|---|---|
| Subjects: | T Technology > TK Electrical engineering. Electronics Nuclear engineering | ||||||
| Divisions: | Faculty of Science > WMG (Formerly the Warwick Manufacturing Group) | ||||||
| Library of Congress Subject Headings (LCSH): | Lithium ion batteries, Lithium ion batteries -- Materials, Lithium ion batteries -- Design and construction, Electric batteries , Electric insulators and insulation -- Polymers | ||||||
| Journal or Publication Title: | ACS Applied Energy Materials | ||||||
| Publisher: | American Chemical Society | ||||||
| ISSN: | 2574-0962 | ||||||
| Official Date: | 8 December 2020 | ||||||
| Dates: |
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| Date of first compliant deposit: | 10 December 2020 | ||||||
| DOI: | 10.1021/acsaem.0c02442 | ||||||
| Status: | Peer Reviewed | ||||||
| Publication Status: | In Press | ||||||
| Access rights to Published version: | Restricted or Subscription Access | ||||||
| Copyright Holders: | Copyright © 2020 American Chemical Society |
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